How to get the New Castle County, DE delinquent tax list
The list of properties with unpaid taxes in New Castle County is a public record. Ask for it under the Delaware Freedom of Information Act with the free letter below. Fill in your details and it is ready to send.
New Castle County at a glance
- Who to ask
- The office that collects property taxes in New Castle County. Depending on the county that is the treasurer, tax collector or tax commissioner.
- The law
- The Delaware Freedom of Information Act.
- Response time
- The office must respond within 15 business days. A response can be the file, a date it will be ready, or a cost estimate.
- Who can ask
- The law gives the right of access to Delaware residents. If you live out of state the office may still answer, but it does not have to.
- Cost
- Offices can charge for copies or staff time on a large data pull. The letter asks for an itemized estimate first.
- Does LienSuite have it?
- Not yet. A records request is the way to get it today.
Your New Castle County records request letter
It updates as you type. Copy it into an email or the county's request form, or download or print it.
Email subject: Public records request: delinquent property tax list, New Castle County, Delaware
November 7, 2026 Records Custodian, New Castle County property tax office New Castle County, Delaware Subject: Public records request: delinquent property tax list, New Castle County, Delaware Dear Records Custodian: Under the Delaware Freedom of Information Act, I request a copy of the current list of real property accounts with delinquent property taxes in New Castle County, Delaware. Please include these fields, to the extent your office keeps them: - Parcel or account number - Owner name - Property (situs) address - Owner mailing address - Tax years that are delinquent - Amount owed (by year, if your office keeps it that way) I would like the list in electronic form (CSV or Excel), sent by email to [Your email]. A file your office already produces is fine. I am not asking you to create a new record. If there is a charge, please send me an itemized estimate first if it will be more than $25. If the list will not be ready within 15 business days, please let me know when I can expect it. If you withhold any part of the list, please tell me which exemption applies and send the rest. Thank you for your help. Sincerely, [Your name] [Your mailing address] [Your email]
How to send it
- Check what New Castle County already posts. Many tax offices publish the delinquent list on their website or in a newspaper notice before a tax sale. If it is posted, you may not need a request at all.
- Find the records contact. Look on the tax office's website for an open-records email address or online request portal. If the office has its own form, you can paste this letter into it.
- Send the letter and keep a copy. Note the date you sent it. In Delaware, the office has 15 business days to respond, and a response can be the file, a date it will be ready, or a cost estimate.
- Approve or question the estimate. Large data pulls can carry a fee for staff or computer time. Ask what it covers before you pay.
Or skip the wait
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